That thing has a completely different motherboard compared to a standard Model I; it looks like it has a printer port built in, an onboard power supply, etc. And what’s with the sidecar disk controller? It’s like a Model III from a parallel universe, where Tandy decided to stick to a separate monitor but fell in love with the TI99/4’s expansion form factor.
The Teac PS-80 was an authorized clone that had a few physical differences from a regular Model I but nothing like this. There is a picture out there of an ad for a “PS-85” that’s an all-in-one 4P-like form factor but there’s nothing more about it and maybe it was never actually sold? Perhaps this is some kind of prototype in an independent line of development.